fix an enum typing bug
fix an enum typing bug

Summary: This `__getattr__` line makes `FooEnum.ANYTHING` type checking pass (even when there is an `AttributeError` raised by runtime) so better remove it.

Reviewed By: Filip-F

Differential Revision: D32771351

fbshipit-source-id: 4621604474d72af6bd11c8e9f1c15c81221f7ee6

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift